The International Energy Forum, also known as IEF, is the world's largest recurring gathering of energy ministers. It is unique in that participants not only include IEA and OPEC countries, but also key international actors such as Brazil, China, India, Mexico, Russia, and South Africa. The IEF countries account for more than 90 percent of global oil and gas supply and demand. The IEF is promoted by a permanent Secretariat based in the Diplomatic Quarter of Riyadh, Saudi Arabia.